A certain strain of bacteria doubles every hour. Initially, there were 3 bacteria present. How many bacteria would
there be after 18 hours ?

What is the volume of this square pyramid?

What is the area of the triangle 10 13 12

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.